Device for breaking pavements



p 1941- 'r. 1.. FERGUSON 2,254,477

'DEVICE FOR BREAKING PAVEMENTS Filed July 27, 1940 3 Sheets-Sheet 1 Sept. 2, 1941.

"r. L FERGUSON 2,254,477.

DEVICE FOR BREAKING PAVEMENTS Filed July 27, 1940 l s Shets-Sheet 2 Ta/z'wrA firyas 0/7 INVENTOR ATTORNEYS WlTNESS Sept? 1941- 'r. L FERGUSON 2,254,477

DEVICE FOR BREAKING PAVEMENTS Filed July 27, 1940 3 Sheets-Sheet 3 7Z ZZWWA/ZryZ/Sa/1 ATTORNEYS WITNESS Patented Sept. 2, 1941 UNITED STATES PATENT OFFICE v DEVICE FOR BREAKING PAVEMENTS V Tuliver L. Ferguson, Edwardsville, Ill. I Application July 27, 1940, Serial No. 347,979

4 Claims.

My invention relates to a machine or device for breaking or demolishing pavements, roadways and the like. 1 J l One of the principal objects of my'invention is to provide a device of the abovedescribed character which is so-constructedand arranged whereby the sam may be mounted upon the chassis of a motorvehicle or the like and automatically operated while the vehicle is in motion or at a standstill.

An important object of my invention is to provide a device of the character described which is simple in construction, durable in use, efficient in operation and economical in manufacture.

Other objects and advantages will .beapparent from the following description, appended claims and annexed drawings; k 7

Referring to the drawings wherein like reference characters designate like parts throughout the several views:

Figure 1 is a top plan view of my invention and illustrating the same mounted on the chassis of a motor truck. I

Figure 2 is a side elevation thereof.

Figure 3 is a rear elevation of the truck equipped with my invention.'

Figure 4 is a sectional View taken on the line 44 of Figure 1.

Figure 5 is a sectional 5-5 of Figure 4.

Figure 6 is a detail side elevation of the axle spindle and mounting illustrated in Figure 5.v

In practising my invention, as illustrated in the drawings, I employ a truck chassis 5 proview taken on the line vided with the usual cab, 6 and which hasmounted on the rear end thereof a body I having disposed on one side a water tank 8. The opposite side of said body is utilized as a fuel compartment 9 the latter being separated from the tank by means of a partition l0. Postjacent the cab 6, one side of the chassis'has mounted thereon a platform ll constituting a bed on which. is supported a steam boiler I 2 having connected thereto, by means of a cut-off valve I3, one end of a steam supply pipe I4, the opposite end of which is connected to a throttle valve l5.

Adjacent the platform H, the opposite side of the chassis has mounted thereon a pair of spaced vertically disposed stationary guides or leaders I6, the upper ends of which are connected together by means of cross members l'l. Slidably mounted between andon the guides I6 is an automatic steam operated hammer l8, the latter being of an ordinary construction and of the type manufactured by the Vulcan Iron 55 Works of Chicago, Ill. Said hammer is equipped with the usual ram l9 having attached thereto an elongated road demolishing member 20fashionedwith a convex lower face 2| for impact with the road.

The hammer is also provided with the usual base 22 through which the member 22 is reciprocated and with means 23, connected by a pipe 24 to the throttle valve l5, for controlling the supply of steam supplied to the cylinder in a manner to effect automatic reciprocation of .the piston therein. Inasmuch as'said hammer is of an ordinary construction and forms. no part of the present invention per se, a more detailed description of the same is not believed neces- Fixed to the chassis, adjacent the platform H, are the lower ends of a pair of spaced upwardly and outwardly extending frame members 25, the upper ends. of which are fixed to the cross member ll. Mounted on the-faces of the members 25, toward the boiler 12, are rails 26' receiving thereon flanged wheels or rollers 21. The rollers 2'! are mounted on'the ends of a transverse axle 28, the latter being fixed to a head 29 mounted on the upper end of a piston rod 39. The piston rod 30 extends downwardly within a cylinder 3i and has fixed thereto a piston 32 for reciprocation in said cylinder by means of a suitable fluid, for instancaoil.

The cylinder is fixed between the members 25 and is provided at its upper and lower ends with oil outlet and inlet connections 33 and 34 respectively. The truck is provided with the usual transmission disposed within the housing 35 and through which extends the front end of a shaft 36 connected to said transmission for rotation thereby. The opposite end of the shaft 36 is connected to the drive shaft of a pump 3'! equipped with a valve mechanism 38, the latter being connected'by means of pipes 39 and 40 to the outlet and inlet connections 33 and 34. respectively. The valve mechanism 38 is operable in one position to eifect pumping of oil into the lower end of the cylinder 3| and withdrawing of oil from the upper end of said cylinder to effect upward movement of the piston 32 therein, and to eliect a reverse operation of the piston when the valve mechanism is operated to another position. The valve mechanism is also capable of being operated to a neutral position whereby to maintain the piston 32'at any desired position within the cylinder. The valve mechanism 38' is operable through the medium of a bell crank lever 4| having its upper end connected to said mechanism 38. The

lever 4| is pivotally mounted on the rear portion of the cab and has its opposite end pivotally. connected to the lower end of an operating rod 42, the upper end of which is connected to a lever 43 pivotally mounted on one of the guides l6 for manual operation, The head 29 has connected thereto one end of cable 44 trained under a pulley 45 rotatably' is notlimited to the specific construction as 11- lustrated and described as the same is only illusthat when the valve mechanism 33 is operated by the lever 43, the hammer is raised or lowered within the guide l6 through thermedium of the piston 32 disposed within the cylinder 3 l as here-, tofore set forth. Inasmuch, as the valvefmech anism 3 8 connected to the pump 31 isof an ordinary construction and constitutes no part of.

the present invention per -se, a more detailed-description of the same is not believed to be ranted.

The side face of the base of the hammer has secured thereto, by means of cap screws50, a yoke 5| on which is fixedthe rear end of a axle spindle 52 having rotatably mounted thereon a tracwar- 'trative of the principles of operation, which are capable of extended application in various forms, and that the invention comprehends all construction within the scope of the appended claims.

7 What I claim is:

1. In combination with a truck, a roadway demolishing device comprising a pair of vertically disposed guides fixed to said truck, an automatically operated hammer slidably mounted on said guide and operable with respect to a roadway to raised and lowered positions, said hammer provided with a reciprocating ram equipped with a roadway engaging element for demolishing said roadway during reciprocation of ram when said hammer is in lowered position, means mounted on said truck and connected to said hammer for reciprocating said ram, and a wheel carried by said hammer and slidable therewith for engagement with said roadway when said hammer isin lowered position to preclude rockingof said truck during reciprocation of said ram. Y

2. In combination with a truck; a roadway demolishingdevice comprising a pair of vertical ly disposed guides fixed to said truck, an automatically operated hammer slidably mounted on tion .wheel 52 for engagement with the roadway whereby to support the truck between the front and rear wheels thereof and: preclude lateral rocking of the chassis'during operation of the ram. The wheel isrraised with the hamrnerand outof engagement with the ground when said hammer is not being operated.

In order to support the hammer in raised position when said hammer is not being operated,

I'provide a yoke55 having its upper end connectd to the chassis frame, adjacent the lower end of the hammer, as at 56. The lower end of the yoke is fashioned with a pair of spaced inwardly extending horizontal sections 51 having their outer'ends provided with U-shaped members 58 in which is mounted a crossbar 59 disposed out of the path of the hammer when the 7 same is lowered in operating position. When the hammer is in raised position the block is removed from the members 58 and disposed outwardly'and' adjacent thereto upon the section 51 and within the path of the hammer as illustrated in dotted lines in Figure 4. Thus the bar 59" serves to support the lower end of the hammer when the' wheel 53 provides means forprecludingrocking of the truck during operation; of the ram.

Without further elaboration the foregoing will so fully explain the invention that others may, by applying current knowledge, readily adapt the same for use under various conditions of service.

Moreover, it is not indispensable that all the features of the invention be used conjointly since they may be employed advantageously in various combinations and sub-combinations. It is obvious that the invention is not confined to the herein described use therefor as it may be utilized for any purpose to which it is adaptable. It is therefore to be understood that theinvention said guide and operable with respect to a roadway to raised and lowered positions, said hammer provided with a reciprocating ram equipped with'a roadway engaging element for demolishing said roadway during reciprocation of ram when said hammer is in lowered position, means mounted on said truck and connected'to said hammer for reciprocating saidram, means carried by said truck and connected to said hammer for raising and lowering said hammer with respect to said roadway, a wheel carried by said hammer and slidable therewith for engagement with said roadway when said hammer is in lowered position to preclude rocking of said truck during reciprocation of said ram, and means connected to said truck and disposable under said hammer when the lat ter is in raised position to support said hammer in said raised position. V

3. In pavement breaking apparatus, the combination of a wheeledcarrier vehicle, guide means mounted on the said vehicle', aham'mer slidable on the said guide means and movable toward and from a pavement, a reciprocable ram carried by the hammer having a pavement demolishing element, means for reciprocating the said ram, and a support member attached tov and carried'by the hammer adapted to engage the pave ment when the hammer is in lowered position to {steady the hammer during operation of the ram.

4. In'roadway demolishing apparatus, the combination with a carrier truck equipped with a hammer guide, of an automatically operated hammerslidably, mounted on the guide, means for adjusting the said hammer to lowered operative'position-and to elevated inoperative position, a reciproeable ram carried by the hammer L. FERGUSON. 

